The dark sections are a result of using NV. They are not there in the original footage.
I've done a profile to remove the noise in the footage. As a result, it's making the flashing light look terrible.

Could you send a reproducible test case (a small project with one short clip and Neat Video added to it, so that the problem was reproducible after rendering that project) to support [at] neatvideo.com please?

We will then directly reproduce the issue, identify the cause and find a solution.

NVTeam wrote:Could you send a reproducible test case (a small project with one short clip and Neat Video added to it, so that the problem was reproducible after rendering that project) to support [at] neatvideo.com please?

We will then directly reproduce the issue, identify the cause and find a solution.